The polycarbonate WP-DC39 case is specifically designed to house the PowerShot ELPH 100 HS, and it includes a wrist strap so you don't lose the camera to the bottomless depths. The diffuser softens the built-in flash of the ELPH 100 HS to reduce the presence of illuminated tiny particles ("back scatter") within your underwater shots.

An O-ring is installed and silicone grease is included to ensure a proper seal. The housing is rated IPX8 ("ingress protection"), meaning that it can be immersed completely in water. It's also rated IP6X to ensure that no sand or dust will breach the casing, either.